Alert archive / Pennsylvania / River Flood Warnings in 2011

River Flood Warning 63, NWS Philadelphia/Mount Holly

April 16, 2011Bucks County, Pennsylvania

NWS Philadelphia/Mount Holly issued this river flood warning at Apr 16, 2011, 11:09 PM EDT for Bucks County, Pennsylvania. It took effect at Apr 17, 2011, 12:24 AM EDT. It was in force for 12 hr.

The area

The counties it named.

The facts

Issued: Apr 16, 2011, 11:09 PM EDT (03:09 UTC)
In effect from: Apr 17, 2011, 12:24 AM EDT
Expired: Apr 17, 2011, 12:07 PM EDT
In force: 12 hr
Issued by: NWS Philadelphia/Mount Holly
Flood severity: Moderate

County Bucks County, PA

The radar

The Philadelphia radar (KDIX), 73 km from the middle of the area, began a volume at 03:10 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Neshaminy Creek near Langhorne (LNGP1). The gauge peaked at 12.13 ft at Apr 17, 2011, 5:00 AM EDT.

Action stage: 8 ft
Minor stage: 9 ft
Moderate stage: 12 ft
Major stage: 14 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01465500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

The text

As transmitted, in the capitals the NWS used until 2016.

088 
WGUS41 KPHI 170309
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1109 PM EDT SAT APR 16 2011

...THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A FLOOD 
WARNING FOR THE FOLLOWING RIVERS IN PENNSYLVANIA... 

  NESHAMINY CREEK AT LANGHORNE AFFECTING BUCKS COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK.

&&

PAC017-170909-
/O.NEW.KPHI.FL.W.0063.110417T0800Z-110417T2000Z/
/LNGP1.2.ER.110417T0800Z.110417T1200Z.110417T1400Z.NO/
1109 PM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A 

* FLOOD WARNING FOR 
  THE NESHAMINY CREEK AT LANGHORNE.
* FROM LATE TONIGHT TO SUNDAY AFTERNOON...OR UNTIL THE WARNING IS 
  CANCELLED.
* AT 10:45 PM SATURDAY THE STAGE WAS 8.6 FEET. 
* FLOOD STAGE IS 9.0 FEET. 
* MODERATE FLOODING IS FORECAST. 
* FORECAST...RISE ABOVE FLOOD STAGE BY EARLY TOMORROW AND CONTINUE TO 
  RISE TO NEAR 10.1 FEET BY TOMORROW MORNING. THE RIVER WILL FALL BELOW 
  FLOOD STAGE BY LATE TOMORROW MORNING.
* IMPACT...AT 10.0 FEET...AT THIS LEVEL SOME HOMES IN THE AREA OF THE 
  LANGHORNE GAGE ARE EVACUATED

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

NESHAMINY CREEK
  LANGHORNE        9.0    8.62  SAT 11 PM   10.1  SUN 8 AM 

&&

4 follow-up statements

607 
WGUS81 KPHI 170425
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
1225 AM EDT SUN APR 17 2011

...THE FLOOD WARNING CONTINUES FOR THE FOLLOWING RIVERS IN 
PENNSYLVANIA...
 
  NESHAMINY CREEK AT LANGHORNE AFFECTING BUCKS COUNTY 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK.

&&

PAC017-171425-
/O.EXT.KPHI.FL.W.0063.110417T0424Z-110417T2300Z/
/LNGP1.2.ER.110417T0254Z.110417T1200Z.110417T1700Z.NO/
1225 AM EDT SUN APR 17 2011

THE FLOOD WARNING CONTINUES FOR
  THE NESHAMINY CREEK AT LANGHORNE.
* UNTIL THIS EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT 12:01 AM SUNDAY THE STAGE WAS 10.8 FEET. 
* FLOOD STAGE IS 9.0 FEET. 
* MODERATE FLOODING IS OCCURRING AND MODERATE FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 11.6 FEET BY THIS 
  MORNING. THE RIVER WILL FALL BELOW FLOOD STAGE THIS AFTERNOON.
* IMPACT...AT 11.0 FEET...AT THIS LEVEL CONSIDERABLE DAMAGE IS REPORTED 
  THROUGHOUT THE LOWER NESHAMINY CREEK BASIN

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

NESHAMINY CREEK
  LANGHORNE        9.0   10.84  SUN 12 AM   11.6  SUN 8 AM 

&&

215 
WGUS41 KPHI 170725
FLWPHI
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE MT HOLLY, NEW JERSEY
325 AM EDT SUN APR 17 2011

...FORECAST FLOODING CHANGED FROM MODERATE TO MAJOR SEVERITY FOR THE 
FOLLOWING RIVERS IN PENNSYLVANIA...
  NESHAMINY CREEK AT LANGHORNE AFFECTING BUCKS COUNTY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK.

&&

PAC017-171325-
/O.CON.KPHI.FL.W.0063.000000T0000Z-110417T2300Z/
/LNGP1.3.ER.110417T0254Z.110417T1000Z.110417T1700Z.NO/
325 AM EDT SUN APR 17 2011

...FORECAST FLOODING INCREASED FROM MODERATE TO MAJOR SEVERITY...
THE FLOOD WARNING CONTINUES FOR 
  THE NESHAMINY CREEK AT LANGHORNE.
* UNTIL THIS EVENING...OR UNTIL THE WARNING IS CANCELLED.
* AT  3:01 AM SUNDAY THE STAGE WAS 11.9 FEET. 
* FLOOD STAGE IS 9.0 FEET. 
* MODERATE FLOODING IS OCCURRING AND MAJOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 12.3 FEET BY THIS 
  MORNING. THE RIVER WILL FALL BELOW FLOOD STAGE THIS AFTERNOON.
* IMPACT...AT 11.0 FEET...AT THIS LEVEL CONSIDERABLE DAMAGE IS REPORTED 
  THROUGHOUT THE LOWER NESHAMINY CREEK BASIN

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

NESHAMINY CREEK
  LANGHORNE        9.0   11.88  SUN 3 AM    12.3  SUN 6 AM 

&&

193 
WGUS81 KPHI 171211
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
811 AM EDT SUN APR 17 2011

...THE FLOOD WARNING CONTINUES FOR THE NESHAMINY CREEK AT
LANGHORNE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SAFETY MESSAGE...DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS. THE 
WATER MAY BE DEEPER THAN YOU THINK IT IS.

&&

PAC017-172211-
/O.CON.KPHI.FL.W.0063.000000T0000Z-110417T2300Z/
/LNGP1.3.ER.110417T0254Z.110417T0901Z.110417T1700Z.NO/
811 AM EDT SUN APR 17 2011

THE FLOOD WARNING CONTINUES FOR
  THE NESHAMINY CREEK AT LANGHORNE.
* AT 8:00 AM, THE STAGE WAS 11.25 FEET AND FALLING. 
* FLOOD STAGE IS 9.0 FEET. 
* FORECAST...THE RIVER LEVEL WILL CONTINUE TO FALL AND IT SHOULD BE
  BACK BELOW FLOOD STAGE BY THIS AFTERNOON.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

NESHAMINY CREEK
  LANGHORNE        9.0   11.25  SUN 800 AM    CRESTED

&&

IOVINO

234 
WGUS81 KPHI 171607
FLSPHI
FLOOD STATEMENT 
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1207 PM EDT SUN APR 17 2011

...THE FLOOD WARNING IS CANCELLED FOR THE NESHAMINY CREEK
AT LANGHORNE...

&&

PAC017-171637-
/O.CAN.KPHI.FL.W.0063.000000T0000Z-110417T2300Z/
/LNGP1.3.ER.110417T0254Z.110417T0901Z.110417T1335Z.NO/
1207 PM EDT SUN APR 17 2011

THE FLOOD WARNING IS CANCELLED FOR
  THE NESHAMINY CREEK AT LANGHORNE.
* AT 11:45 AM, THE STAGE WAS 7.1 FEET AND FALLING. 
* FLOOD STAGE IS 9.0 FEET. 
* FORECAST...THE RIVER LEVEL WILL CONTINUE TO FALL.

$$

                   FLD      OBSERVED          FORECAST
 LOCATION          STG    STG  DAY TIME       CREST

NESHAMINY CREEK
  LANGHORNE        9.0    7.09  SUN 1200 PM   CRESTED 

&&

IOVINO

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 16, 8:08 PM EDT	Areal Flood Warning	PHI	Bucks, Delaware, Montgomery, Philadelphia	8 hr
Apr 16, 9:11 PM EDT	Severe Thunderstorm Warning	PHI	Chester	64 min
Apr 16, 9:18 PM EDT	River Flood Warning	PHI	Chester	11 hr
Apr 16, 9:32 PM EDT	River Flood Warning	PHI	Delaware	6 hr
Apr 16, 9:49 PM EDT	Special Weather Statement	PHI	Berks, Lehigh	56 min
Apr 16, 11:11 PM EDT	River Flood Warning	PHI	Montgomery	6 hr
Apr 17, 1:05 AM EDT	Areal Flood Warning	PHI	Berks	5 hr
Apr 17, 3:56 AM EDT	Areal Flood Warning	PHI	Bucks, Chester, Delaware, Montgomery, Philadelphia	6 hr
Apr 17, 6:07 AM EDT	Areal Flood Warning	PHI	Chester	3 hr
Apr 17, 6:37 AM EDT	River Flood Warning	PHI	Chester, Delaware	7 hr
Apr 17, 9:51 AM EDT	Coastal Flood Warning	PHI	Delaware, Philadelphia	4 hr

Nearby

River Flood Warnings in Pennsylvania, 2011 Every river flood warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.